I mostly use a trackball, but I have my G5v2 connected and on the desk just in case an ordinary mouse is better for some task. Months go by without me touching it.

When I use the mouse, I use it on one of those large desk protectors/writing surfaces, so I don't have a dedicated mouse pad. If I didn't have the writing surface thingy, I would have a mousepad for it since I'd never use a mouse on the bare desk surface. That would risk wearing off the gliding pads/paws on the bottom of the mouse faster.
Some will say "you can buy new pads", but I think spending money on fixing an avoidable problem is sort of stupid in this case.

Razer goliath US.... it is there biggest one. feels nice under my wrist but can not handel the high dpi as it is a soft mat andwit the pressure of my hand the cursour goes all over so i got to keep my dpi setting round the 3K mark aand 1000mhz